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Unformatted text preview: Sample distribution of the sample mean If the population is normal, the sample mean x^= population mean u however variance of the sampling distribution gets divided by the sample size (or SD gets divided by the root of n). If the population is nonnormal, the central limit thereom ensures that it will be normal, provided the sample size is large enough. Combined events P(A and B)= P(A) + P(B) P(A and B) If two events are independent, we use the multiplication rule, P(A) x P(B) The mean of a random variable, unlike a set of observations, takes into account that all outcomes are not equally likely....
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This note was uploaded on 02/27/2011 for the course STAT 2120 taught by Professor Jeffreyholt during the Fall '10 term at UVA.
 Fall '10
 JEFFREYHOLT
 Statistics, Correlation, Variance

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